1 files changed, 363 insertions, 296 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index 006c84bb3f9f..31cb8699e198 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -31,12 +31,14 @@
  * SOFTWARE.
  */
 
-#include <linux/platform_device.h>
 #include <linux/vmalloc.h>
+#include <linux/count_zeros.h>
 #include <rdma/ib_umem.h>
+#include <linux/math.h>
 #include "hns_roce_device.h"
 #include "hns_roce_cmd.h"
 #include "hns_roce_hem.h"
+#include "hns_roce_trace.h"
 
 static u32 hw_index_to_key(int ind)
 {
@@ -48,24 +50,6 @@ unsigned long key_to_hw_index(u32 key)
 	return (key << 24) | (key >> 8);
 }
 
-static int hns_roce_hw_create_mpt(struct hns_roce_dev *hr_dev,
-				  struct hns_roce_cmd_mailbox *mailbox,
-				  unsigned long mpt_index)
-{
-	return hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0, mpt_index, 0,
-				 HNS_ROCE_CMD_CREATE_MPT,
-				 HNS_ROCE_CMD_TIMEOUT_MSECS);
-}
-
-int hns_roce_hw_destroy_mpt(struct hns_roce_dev *hr_dev,
-			    struct hns_roce_cmd_mailbox *mailbox,
-			    unsigned long mpt_index)
-{
-	return hns_roce_cmd_mbox(hr_dev, 0, mailbox ? mailbox->dma : 0,
-				 mpt_index, !mailbox, HNS_ROCE_CMD_DESTROY_MPT,
-				 HNS_ROCE_CMD_TIMEOUT_MSECS);
-}
-
 static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 {
 	struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
@@ -81,7 +65,7 @@ static int alloc_mr_key(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 		return -ENOMEM;
 	}
 
-	mr->key = hw_index_to_key(id);		/* MR key */
+	mr->key = hw_index_to_key(id); /* MR key */
 
 	err = hns_roce_table_get(hr_dev, &hr_dev->mr_table.mtpt_table,
 				 (unsigned long)id);
@@ -121,14 +105,21 @@ static int alloc_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
 	buf_attr.user_access = mr->access;
 	/* fast MR's buffer is alloced before mapping, not at creation */
 	buf_attr.mtt_only = is_fast;
+	buf_attr.iova = mr->iova;
+	/* pagesize and hopnum is fixed for fast MR */
+	buf_attr.adaptive = !is_fast;
+	buf_attr.type = MTR_PBL;
 
 	err = hns_roce_mtr_create(hr_dev, &mr->pbl_mtr, &buf_attr,
 				  hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT,
 				  udata, start);
-	if (err)
+	if (err) {
 		ibdev_err(ibdev, "failed to alloc pbl mtr, ret = %d.\n", err);
-	else
-		mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count;
+		return err;
+	}
+
+	mr->npages = mr->pbl_mtr.hem_cfg.buf_pg_count;
+	mr->pbl_hop_num = buf_attr.region[0].hopnum;
 
 	return err;
 }
@@ -138,19 +129,18 @@ static void free_mr_pbl(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 	hns_roce_mtr_destroy(hr_dev, &mr->pbl_mtr);
 }
 
-static void hns_roce_mr_free(struct hns_roce_dev *hr_dev,
-			     struct hns_roce_mr *mr)
+static void hns_roce_mr_free(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr)
 {
 	struct ib_device *ibdev = &hr_dev->ib_dev;
 	int ret;
 
 	if (mr->enabled) {
-		ret = hns_roce_hw_destroy_mpt(hr_dev, NULL,
+		ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
 					      key_to_hw_index(mr->key) &
 					      (hr_dev->caps.num_mtpts - 1));
 		if (ret)
-			ibdev_warn(ibdev, "failed to destroy mpt, ret = %d.\n",
-				   ret);
+			ibdev_warn_ratelimited(ibdev, "failed to destroy mpt, ret = %d.\n",
+					       ret);
 	}
 
 	free_mr_pbl(hr_dev, mr);
@@ -167,22 +157,20 @@ static int hns_roce_mr_enable(struct hns_roce_dev *hr_dev,
 
 	/* Allocate mailbox memory */
 	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-	if (IS_ERR(mailbox)) {
-		ret = PTR_ERR(mailbox);
-		return ret;
-	}
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
 
+	trace_hns_mr(mr);
 	if (mr->type != MR_TYPE_FRMR)
-		ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr,
-					     mtpt_idx);
+		ret = hr_dev->hw->write_mtpt(hr_dev, mailbox->buf, mr);
 	else
-		ret = hr_dev->hw->frmr_write_mtpt(hr_dev, mailbox->buf, mr);
+		ret = hr_dev->hw->frmr_write_mtpt(mailbox->buf, mr);
 	if (ret) {
 		dev_err(dev, "failed to write mtpt, ret = %d.\n", ret);
 		goto err_page;
 	}
 
-	ret = hns_roce_hw_create_mpt(hr_dev, mailbox,
+	ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
 				     mtpt_idx & (hr_dev->caps.num_mtpts - 1));
 	if (ret) {
 		dev_err(dev, "failed to create mpt, ret = %d.\n", ret);
@@ -213,7 +201,7 @@ struct ib_mr *hns_roce_get_dma_mr(struct ib_pd *pd, int acc)
 	int ret;
 
 	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
-	if (mr == NULL)
+	if (!mr)
 		return  ERR_PTR(-ENOMEM);
 
 	mr->type = MR_TYPE_DMA;
@@ -243,15 +231,23 @@ err_free:
 
 struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 				   u64 virt_addr, int access_flags,
+				   struct ib_dmah *dmah,
 				   struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
 	struct hns_roce_mr *mr;
 	int ret;
 
+	if (dmah) {
+		ret = -EOPNOTSUPP;
+		goto err_out;
+	}
+
 	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
-	if (!mr)
-		return ERR_PTR(-ENOMEM);
+	if (!mr) {
+		ret = -ENOMEM;
+		goto err_out;
+	}
 
 	mr->iova = virt_addr;
 	mr->size = length;
@@ -272,7 +268,6 @@ struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 		goto err_alloc_pbl;
 
 	mr->ibmr.rkey = mr->ibmr.lkey = mr->key;
-	mr->ibmr.length = length;
 
 	return &mr->ibmr;
 
@@ -282,6 +277,9 @@ err_alloc_key:
 	free_mr_key(hr_dev, mr);
 err_alloc_mr:
 	kfree(mr);
+err_out:
+	atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_MR_REG_ERR_CNT]);
+
 	return ERR_PTR(ret);
 }
 
@@ -297,21 +295,25 @@ struct ib_mr *hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start,
 	unsigned long mtpt_idx;
 	int ret;
 
-	if (!mr->enabled)
-		return ERR_PTR(-EINVAL);
+	if (!mr->enabled) {
+		ret = -EINVAL;
+		goto err_out;
+	}
 
 	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-	if (IS_ERR(mailbox))
-		return ERR_CAST(mailbox);
+	ret = PTR_ERR_OR_ZERO(mailbox);
+	if (ret)
+		goto err_out;
 
 	mtpt_idx = key_to_hw_index(mr->key) & (hr_dev->caps.num_mtpts - 1);
-	ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, mtpt_idx, 0,
-				HNS_ROCE_CMD_QUERY_MPT,
-				HNS_ROCE_CMD_TIMEOUT_MSECS);
+
+	ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, HNS_ROCE_CMD_QUERY_MPT,
+				mtpt_idx);
 	if (ret)
 		goto free_cmd_mbox;
 
-	ret = hns_roce_hw_destroy_mpt(hr_dev, NULL, mtpt_idx);
+	ret = hns_roce_destroy_hw_ctx(hr_dev, HNS_ROCE_CMD_DESTROY_MPT,
+				      mtpt_idx);
 	if (ret)
 		ibdev_warn(ib_dev, "failed to destroy MPT, ret = %d.\n", ret);
 
@@ -341,7 +343,8 @@ struct ib_mr *hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start,
 		goto free_cmd_mbox;
 	}
 
-	ret = hns_roce_hw_create_mpt(hr_dev, mailbox, mtpt_idx);
+	ret = hns_roce_create_hw_ctx(hr_dev, mailbox, HNS_ROCE_CMD_CREATE_MPT,
+				     mtpt_idx);
 	if (ret) {
 		ibdev_err(ib_dev, "failed to create MPT, ret = %d.\n", ret);
 		goto free_cmd_mbox;
@@ -352,23 +355,27 @@ struct ib_mr *hns_roce_rereg_user_mr(struct ib_mr *ibmr, int flags, u64 start,
 free_cmd_mbox:
 	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
 
-	return ERR_PTR(ret);
+err_out:
+	if (ret) {
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_MR_REREG_ERR_CNT]);
+		return ERR_PTR(ret);
+	}
+
+	return NULL;
 }
 
 int hns_roce_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
 	struct hns_roce_mr *mr = to_hr_mr(ibmr);
-	int ret = 0;
 
-	if (hr_dev->hw->dereg_mr) {
-		ret = hr_dev->hw->dereg_mr(hr_dev, mr, udata);
-	} else {
-		hns_roce_mr_free(hr_dev, mr);
-		kfree(mr);
-	}
+	if (hr_dev->hw->dereg_mr)
+		hr_dev->hw->dereg_mr(hr_dev);
 
-	return ret;
+	hns_roce_mr_free(hr_dev, mr);
+	kfree(mr);
+
+	return 0;
 }
 
 struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
@@ -414,10 +421,10 @@ struct ib_mr *hns_roce_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
 
 	return &mr->ibmr;
 
-err_key:
-	free_mr_key(hr_dev, mr);
 err_pbl:
 	free_mr_pbl(hr_dev, mr);
+err_key:
+	free_mr_key(hr_dev, mr);
 err_free:
 	kfree(mr);
 	return ERR_PTR(ret);
@@ -436,24 +443,30 @@ static int hns_roce_set_page(struct ib_mr *ibmr, u64 addr)
 }
 
 int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
-		       unsigned int *sg_offset)
+		       unsigned int *sg_offset_p)
 {
+	unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibmr->device);
 	struct ib_device *ibdev = &hr_dev->ib_dev;
 	struct hns_roce_mr *mr = to_hr_mr(ibmr);
 	struct hns_roce_mtr *mtr = &mr->pbl_mtr;
-	int ret = 0;
+	int ret, sg_num = 0;
+
+	if (!IS_ALIGNED(sg_offset, HNS_ROCE_FRMR_ALIGN_SIZE) ||
+	    ibmr->page_size < HNS_HW_PAGE_SIZE ||
+	    ibmr->page_size > HNS_HW_MAX_PAGE_SIZE)
+		return sg_num;
 
 	mr->npages = 0;
 	mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count,
 				 sizeof(dma_addr_t), GFP_KERNEL);
 	if (!mr->page_list)
-		return ret;
+		return sg_num;
 
-	ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page);
-	if (ret < 1) {
+	sg_num = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset_p, hns_roce_set_page);
+	if (sg_num < 1) {
 		ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n",
-			  mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret);
+			  mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, sg_num);
 		goto err_page_list;
 	}
 
@@ -464,131 +477,16 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
 	ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages);
 	if (ret) {
 		ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret);
-		ret = 0;
+		sg_num = 0;
 	} else {
 		mr->pbl_mtr.hem_cfg.buf_pg_shift = (u32)ilog2(ibmr->page_size);
-		ret = mr->npages;
 	}
 
 err_page_list:
 	kvfree(mr->page_list);
 	mr->page_list = NULL;
 
-	return ret;
-}
-
-static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,
-			     struct hns_roce_mw *mw)
-{
-	struct device *dev = hr_dev->dev;
-	int ret;
-
-	if (mw->enabled) {
-		ret = hns_roce_hw_destroy_mpt(hr_dev, NULL,
-					      key_to_hw_index(mw->rkey) &
-					      (hr_dev->caps.num_mtpts - 1));
-		if (ret)
-			dev_warn(dev, "MW DESTROY_MPT failed (%d)\n", ret);
-
-		hns_roce_table_put(hr_dev, &hr_dev->mr_table.mtpt_table,
-				   key_to_hw_index(mw->rkey));
-	}
-
-	ida_free(&hr_dev->mr_table.mtpt_ida.ida,
-		 (int)key_to_hw_index(mw->rkey));
-}
-
-static int hns_roce_mw_enable(struct hns_roce_dev *hr_dev,
-			      struct hns_roce_mw *mw)
-{
-	struct hns_roce_mr_table *mr_table = &hr_dev->mr_table;
-	struct hns_roce_cmd_mailbox *mailbox;
-	struct device *dev = hr_dev->dev;
-	unsigned long mtpt_idx = key_to_hw_index(mw->rkey);
-	int ret;
-
-	/* prepare HEM entry memory */
-	ret = hns_roce_table_get(hr_dev, &mr_table->mtpt_table, mtpt_idx);
-	if (ret)
-		return ret;
-
-	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-	if (IS_ERR(mailbox)) {
-		ret = PTR_ERR(mailbox);
-		goto err_table;
-	}
-
-	ret = hr_dev->hw->mw_write_mtpt(mailbox->buf, mw);
-	if (ret) {
-		dev_err(dev, "MW write mtpt fail!\n");
-		goto err_page;
-	}
-
-	ret = hns_roce_hw_create_mpt(hr_dev, mailbox,
-				     mtpt_idx & (hr_dev->caps.num_mtpts - 1));
-	if (ret) {
-		dev_err(dev, "MW CREATE_MPT failed (%d)\n", ret);
-		goto err_page;
-	}
-
-	mw->enabled = 1;
-
-	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
-
-	return 0;
-
-err_page:
-	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
-
-err_table:
-	hns_roce_table_put(hr_dev, &mr_table->mtpt_table, mtpt_idx);
-
-	return ret;
-}
-
-int hns_roce_alloc_mw(struct ib_mw *ibmw, struct ib_udata *udata)
-{
-	struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
-	struct hns_roce_ida *mtpt_ida = &hr_dev->mr_table.mtpt_ida;
-	struct ib_device *ibdev = &hr_dev->ib_dev;
-	struct hns_roce_mw *mw = to_hr_mw(ibmw);
-	int ret;
-	int id;
-
-	/* Allocate a key for mw from mr_table */
-	id = ida_alloc_range(&mtpt_ida->ida, mtpt_ida->min, mtpt_ida->max,
-			     GFP_KERNEL);
-	if (id < 0) {
-		ibdev_err(ibdev, "failed to alloc id for MW key, id(%d)\n", id);
-		return -ENOMEM;
-	}
-
-	mw->rkey = hw_index_to_key(id);
-
-	ibmw->rkey = mw->rkey;
-	mw->pdn = to_hr_pd(ibmw->pd)->pdn;
-	mw->pbl_hop_num = hr_dev->caps.pbl_hop_num;
-	mw->pbl_ba_pg_sz = hr_dev->caps.pbl_ba_pg_sz;
-	mw->pbl_buf_pg_sz = hr_dev->caps.pbl_buf_pg_sz;
-
-	ret = hns_roce_mw_enable(hr_dev, mw);
-	if (ret)
-		goto err_mw;
-
-	return 0;
-
-err_mw:
-	hns_roce_mw_free(hr_dev, mw);
-	return ret;
-}
-
-int hns_roce_dealloc_mw(struct ib_mw *ibmw)
-{
-	struct hns_roce_dev *hr_dev = to_hr_dev(ibmw->device);
-	struct hns_roce_mw *mw = to_hr_mw(ibmw);
-
-	hns_roce_mw_free(hr_dev, mw);
-	return 0;
+	return sg_num;
 }
 
 static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
@@ -607,15 +505,12 @@ static int mtr_map_region(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	while (offset < end && npage < max_count) {
 		count = 0;
 		mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
-						  offset, &count, NULL);
+						  offset, &count);
 		if (!mtts)
 			return -ENOBUFS;
 
 		for (i = 0; i < count && npage < max_count; i++) {
-			if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
-				addr = to_hr_hw_page_addr(pages[npage]);
-			else
-				addr = pages[npage];
+			addr = pages[npage];
 
 			mtts[i] = cpu_to_le64(addr);
 			npage++;
@@ -698,20 +593,20 @@ static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 		mtr->kmem = NULL;
 		mtr->umem = ib_umem_get(ibdev, user_addr, total_size,
 					buf_attr->user_access);
-		if (IS_ERR_OR_NULL(mtr->umem)) {
-			ibdev_err(ibdev, "failed to get umem, ret = %ld.\n",
-				  PTR_ERR(mtr->umem));
+		if (IS_ERR(mtr->umem)) {
+			ibdev_err(ibdev, "failed to get umem, ret = %pe.\n",
+				  mtr->umem);
 			return -ENOMEM;
 		}
 	} else {
 		mtr->umem = NULL;
 		mtr->kmem = hns_roce_buf_alloc(hr_dev, total_size,
 					       buf_attr->page_shift,
-					       mtr->hem_cfg.is_direct ?
+					       !mtr_has_mtt(buf_attr) ?
 					       HNS_ROCE_BUF_DIRECT : 0);
 		if (IS_ERR(mtr->kmem)) {
-			ibdev_err(ibdev, "failed to alloc kmem, ret = %ld.\n",
-				  PTR_ERR(mtr->kmem));
+			ibdev_err(ibdev, "failed to alloc kmem, ret = %pe.\n",
+				  mtr->kmem);
 			return PTR_ERR(mtr->kmem);
 		}
 	}
@@ -719,21 +614,48 @@ static int mtr_alloc_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	return 0;
 }
 
-static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
-			int page_count, unsigned int page_shift)
+static int cal_mtr_pg_cnt(struct hns_roce_mtr *mtr)
+{
+	struct hns_roce_buf_region *region;
+	int page_cnt = 0;
+	int i;
+
+	for (i = 0; i < mtr->hem_cfg.region_count; i++) {
+		region = &mtr->hem_cfg.region[i];
+		page_cnt += region->count;
+	}
+
+	return page_cnt;
+}
+
+static bool need_split_huge_page(struct hns_roce_mtr *mtr)
+{
+	/* When HEM buffer uses 0-level addressing, the page size is
+	 * equal to the whole buffer size. If the current MTR has multiple
+	 * regions, we split the buffer into small pages(4k, required by hns
+	 * ROCEE). These pages will be used in multiple regions.
+	 */
+	return mtr->hem_cfg.is_direct && mtr->hem_cfg.region_count > 1;
+}
+
+static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr)
 {
 	struct ib_device *ibdev = &hr_dev->ib_dev;
+	int page_count = cal_mtr_pg_cnt(mtr);
+	unsigned int page_shift;
 	dma_addr_t *pages;
 	int npage;
 	int ret;
 
+	page_shift = need_split_huge_page(mtr) ? HNS_HW_PAGE_SHIFT :
+						 mtr->hem_cfg.buf_pg_shift;
 	/* alloc a tmp array to store buffer's dma address */
 	pages = kvcalloc(page_count, sizeof(dma_addr_t), GFP_KERNEL);
 	if (!pages)
 		return -ENOMEM;
 
 	if (mtr->umem)
-		npage = hns_roce_get_umem_bufs(hr_dev, pages, page_count,
+		npage = hns_roce_get_umem_bufs(pages, page_count,
 					       mtr->umem, page_shift);
 	else
 		npage = hns_roce_get_kmem_bufs(hr_dev, pages, page_count,
@@ -746,7 +668,7 @@ static int mtr_map_bufs(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 		goto err_alloc_list;
 	}
 
-	if (mtr->hem_cfg.is_direct && npage > 1) {
+	if (need_split_huge_page(mtr) && npage > 1) {
 		ret = mtr_check_direct_pages(pages, npage, page_shift);
 		if (ret) {
 			ibdev_err(ibdev, "failed to check %s page: %d / %d.\n",
@@ -786,11 +708,6 @@ int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	for (i = 0, mapped_cnt = 0; i < mtr->hem_cfg.region_count &&
 	     mapped_cnt < page_cnt; i++) {
 		r = &mtr->hem_cfg.region[i];
-		/* if hopnum is 0, no need to map pages in this region */
-		if (!r->hopnum) {
-			mapped_cnt += r->count;
-			continue;
-		}
 
 		if (r->offset + r->count > page_cnt) {
 			ret = -EINVAL;
@@ -821,50 +738,53 @@ int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	return ret;
 }
 
-int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
-		      int offset, u64 *mtt_buf, int mtt_max, u64 *base_addr)
+static int hns_roce_get_direct_addr_mtt(struct hns_roce_hem_cfg *cfg,
+					u32 start_index, u64 *mtt_buf,
+					int mtt_cnt)
 {
-	struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
-	int mtt_count, left;
-	int start_index;
+	int mtt_count;
 	int total = 0;
-	__le64 *mtts;
 	u32 npage;
 	u64 addr;
 
-	if (!mtt_buf || mtt_max < 1)
-		goto done;
-
-	/* no mtt memory in direct mode, so just return the buffer address */
-	if (cfg->is_direct) {
-		start_index = offset >> HNS_HW_PAGE_SHIFT;
-		for (mtt_count = 0; mtt_count < cfg->region_count &&
-		     total < mtt_max; mtt_count++) {
-			npage = cfg->region[mtt_count].offset;
-			if (npage < start_index)
-				continue;
+	if (mtt_cnt > cfg->region_count)
+		return -EINVAL;
 
-			addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT);
-			if (hr_dev->hw_rev == HNS_ROCE_HW_VER1)
-				mtt_buf[total] = to_hr_hw_page_addr(addr);
-			else
-				mtt_buf[total] = addr;
+	for (mtt_count = 0; mtt_count < cfg->region_count && total < mtt_cnt;
+	     mtt_count++) {
+		npage = cfg->region[mtt_count].offset;
+		if (npage < start_index)
+			continue;
 
-			total++;
-		}
+		addr = cfg->root_ba + (npage << HNS_HW_PAGE_SHIFT);
+		mtt_buf[total] = addr;
 
-		goto done;
+		total++;
 	}
 
-	start_index = offset >> cfg->buf_pg_shift;
-	left = mtt_max;
+	if (!total)
+		return -ENOENT;
+
+	return 0;
+}
+
+static int hns_roce_get_mhop_mtt(struct hns_roce_dev *hr_dev,
+				 struct hns_roce_mtr *mtr, u32 start_index,
+				 u64 *mtt_buf, int mtt_cnt)
+{
+	int left = mtt_cnt;
+	int total = 0;
+	int mtt_count;
+	__le64 *mtts;
+	u32 npage;
+
 	while (left > 0) {
 		mtt_count = 0;
 		mtts = hns_roce_hem_list_find_mtt(hr_dev, &mtr->hem_list,
 						  start_index + total,
-						  &mtt_count, NULL);
+						  &mtt_count);
 		if (!mtts || !mtt_count)
-			goto done;
+			break;
 
 		npage = min(mtt_count, left);
 		left -= npage;
@@ -872,69 +792,203 @@ int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 			mtt_buf[total++] = le64_to_cpu(mtts[mtt_count]);
 	}
 
-done:
-	if (base_addr)
-		*base_addr = cfg->root_ba;
+	if (!total)
+		return -ENOENT;
+
+	return 0;
+}
+
+int hns_roce_mtr_find(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
+		      u32 offset, u64 *mtt_buf, int mtt_max)
+{
+	struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
+	u32 start_index;
+	int ret;
+
+	if (!mtt_buf || mtt_max < 1)
+		return -EINVAL;
+
+	/* no mtt memory in direct mode, so just return the buffer address */
+	if (cfg->is_direct) {
+		start_index = offset >> HNS_HW_PAGE_SHIFT;
+		ret = hns_roce_get_direct_addr_mtt(cfg, start_index,
+						   mtt_buf, mtt_max);
+	} else {
+		start_index = offset >> cfg->buf_pg_shift;
+		ret = hns_roce_get_mhop_mtt(hr_dev, mtr, start_index,
+					    mtt_buf, mtt_max);
+	}
+	return ret;
+}
+
+static int get_best_page_shift(struct hns_roce_dev *hr_dev,
+			       struct hns_roce_mtr *mtr,
+			       struct hns_roce_buf_attr *buf_attr)
+{
+	unsigned int page_sz;
 
-	return total;
+	if (!buf_attr->adaptive || buf_attr->type != MTR_PBL || !mtr->umem)
+		return 0;
+
+	page_sz = ib_umem_find_best_pgsz(mtr->umem,
+					 hr_dev->caps.page_size_cap,
+					 buf_attr->iova);
+	if (!page_sz)
+		return -EINVAL;
+
+	buf_attr->page_shift = order_base_2(page_sz);
+	return 0;
+}
+
+static int get_best_hop_num(struct hns_roce_dev *hr_dev,
+			    struct hns_roce_mtr *mtr,
+			    struct hns_roce_buf_attr *buf_attr,
+			    unsigned int ba_pg_shift)
+{
+#define INVALID_HOPNUM -1
+#define MIN_BA_CNT 1
+	size_t buf_pg_sz = 1 << buf_attr->page_shift;
+	struct ib_device *ibdev = &hr_dev->ib_dev;
+	size_t ba_pg_sz = 1 << ba_pg_shift;
+	int hop_num = INVALID_HOPNUM;
+	size_t unit = MIN_BA_CNT;
+	size_t ba_cnt;
+	int j;
+
+	if (!buf_attr->adaptive || buf_attr->type != MTR_PBL)
+		return 0;
+
+	/* Caculating the number of buf pages, each buf page need a BA */
+	if (mtr->umem)
+		ba_cnt = ib_umem_num_dma_blocks(mtr->umem, buf_pg_sz);
+	else
+		ba_cnt = DIV_ROUND_UP(buf_attr->region[0].size, buf_pg_sz);
+
+	for (j = 0; j <= HNS_ROCE_MAX_HOP_NUM; j++) {
+		if (ba_cnt <= unit) {
+			hop_num = j;
+			break;
+		}
+		/* Number of BAs can be represented at per hop */
+		unit *= ba_pg_sz / BA_BYTE_LEN;
+	}
+
+	if (hop_num < 0) {
+		ibdev_err(ibdev,
+			  "failed to calculate a valid hopnum.\n");
+		return -EINVAL;
+	}
+
+	buf_attr->region[0].hopnum = hop_num;
+
+	return 0;
+}
+
+static bool is_buf_attr_valid(struct hns_roce_dev *hr_dev,
+			      struct hns_roce_buf_attr *attr)
+{
+	struct ib_device *ibdev = &hr_dev->ib_dev;
+
+	if (attr->region_count > ARRAY_SIZE(attr->region) ||
+	    attr->region_count < 1 || attr->page_shift < HNS_HW_PAGE_SHIFT) {
+		ibdev_err(ibdev,
+			  "invalid buf attr, region count %u, page shift %u.\n",
+			  attr->region_count, attr->page_shift);
+		return false;
+	}
+
+	return true;
 }
 
 static int mtr_init_buf_cfg(struct hns_roce_dev *hr_dev,
-			    struct hns_roce_buf_attr *attr,
-			    struct hns_roce_hem_cfg *cfg,
-			    unsigned int *buf_page_shift, int unalinged_size)
+			    struct hns_roce_mtr *mtr,
+			    struct hns_roce_buf_attr *attr)
 {
+	struct hns_roce_hem_cfg *cfg = &mtr->hem_cfg;
 	struct hns_roce_buf_region *r;
-	int first_region_padding;
-	int page_cnt, region_cnt;
-	unsigned int page_shift;
+	size_t buf_pg_sz;
 	size_t buf_size;
+	int page_cnt, i;
+	u64 pgoff = 0;
+
+	if (!is_buf_attr_valid(hr_dev, attr))
+		return -EINVAL;
 
 	/* If mtt is disabled, all pages must be within a continuous range */
 	cfg->is_direct = !mtr_has_mtt(attr);
+	cfg->region_count = attr->region_count;
 	buf_size = mtr_bufs_size(attr);
-	if (cfg->is_direct) {
-		/* When HEM buffer uses 0-level addressing, the page size is
-		 * equal to the whole buffer size, and we split the buffer into
-		 * small pages which is used to check whether the adjacent
-		 * units are in the continuous space and its size is fixed to
-		 * 4K based on hns ROCEE's requirement.
-		 */
-		page_shift = HNS_HW_PAGE_SHIFT;
-
-		/* The ROCEE requires the page size to be 4K * 2 ^ N. */
+	if (need_split_huge_page(mtr)) {
+		buf_pg_sz = HNS_HW_PAGE_SIZE;
 		cfg->buf_pg_count = 1;
+		/* The ROCEE requires the page size to be 4K * 2 ^ N. */
 		cfg->buf_pg_shift = HNS_HW_PAGE_SHIFT +
 			order_base_2(DIV_ROUND_UP(buf_size, HNS_HW_PAGE_SIZE));
-		first_region_padding = 0;
 	} else {
-		page_shift = attr->page_shift;
-		cfg->buf_pg_count = DIV_ROUND_UP(buf_size + unalinged_size,
-						 1 << page_shift);
-		cfg->buf_pg_shift = page_shift;
-		first_region_padding = unalinged_size;
+		buf_pg_sz = 1 << attr->page_shift;
+		cfg->buf_pg_count = mtr->umem ?
+			ib_umem_num_dma_blocks(mtr->umem, buf_pg_sz) :
+			DIV_ROUND_UP(buf_size, buf_pg_sz);
+		cfg->buf_pg_shift = attr->page_shift;
+		pgoff = mtr->umem ? mtr->umem->address & ~PAGE_MASK : 0;
 	}
 
 	/* Convert buffer size to page index and page count for each region and
 	 * the buffer's offset needs to be appended to the first region.
 	 */
-	for (page_cnt = 0, region_cnt = 0; region_cnt < attr->region_count &&
-	     region_cnt < ARRAY_SIZE(cfg->region); region_cnt++) {
-		r = &cfg->region[region_cnt];
+	for (page_cnt = 0, i = 0; i < attr->region_count; i++) {
+		r = &cfg->region[i];
 		r->offset = page_cnt;
-		buf_size = hr_hw_page_align(attr->region[region_cnt].size +
-					    first_region_padding);
-		r->count = DIV_ROUND_UP(buf_size, 1 << page_shift);
-		first_region_padding = 0;
+		buf_size = hr_hw_page_align(attr->region[i].size + pgoff);
+		if (attr->type == MTR_PBL && mtr->umem)
+			r->count = ib_umem_num_dma_blocks(mtr->umem, buf_pg_sz);
+		else
+			r->count = DIV_ROUND_UP(buf_size, buf_pg_sz);
+
+		pgoff = 0;
 		page_cnt += r->count;
-		r->hopnum = to_hr_hem_hopnum(attr->region[region_cnt].hopnum,
-					     r->count);
+		r->hopnum = to_hr_hem_hopnum(attr->region[i].hopnum, r->count);
 	}
 
-	cfg->region_count = region_cnt;
-	*buf_page_shift = page_shift;
+	return 0;
+}
 
-	return page_cnt;
+static u64 cal_pages_per_l1ba(unsigned int ba_per_bt, unsigned int hopnum)
+{
+	return int_pow(ba_per_bt, hopnum - 1);
+}
+
+static unsigned int cal_best_bt_pg_sz(struct hns_roce_dev *hr_dev,
+				      struct hns_roce_mtr *mtr,
+				      unsigned int pg_shift)
+{
+	unsigned long cap = hr_dev->caps.page_size_cap;
+	struct hns_roce_buf_region *re;
+	unsigned int pgs_per_l1ba;
+	unsigned int ba_per_bt;
+	unsigned int ba_num;
+	int i;
+
+	for_each_set_bit_from(pg_shift, &cap, sizeof(cap) * BITS_PER_BYTE) {
+		if (!(BIT(pg_shift) & cap))
+			continue;
+
+		ba_per_bt = BIT(pg_shift) / BA_BYTE_LEN;
+		ba_num = 0;
+		for (i = 0; i < mtr->hem_cfg.region_count; i++) {
+			re = &mtr->hem_cfg.region[i];
+			if (re->hopnum == 0)
+				continue;
+
+			pgs_per_l1ba = cal_pages_per_l1ba(ba_per_bt, re->hopnum);
+			ba_num += DIV_ROUND_UP(re->count, pgs_per_l1ba);
+		}
+
+		if (ba_num <= ba_per_bt)
+			return pg_shift;
+	}
+
+	return 0;
 }
 
 static int mtr_alloc_mtt(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
@@ -945,6 +999,10 @@ static int mtr_alloc_mtt(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 
 	hns_roce_hem_list_init(&mtr->hem_list);
 	if (!cfg->is_direct) {
+		ba_page_shift = cal_best_bt_pg_sz(hr_dev, mtr, ba_page_shift);
+		if (!ba_page_shift)
+			return -ERANGE;
+
 		ret = hns_roce_hem_list_request(hr_dev, &mtr->hem_list,
 						cfg->region, cfg->region_count,
 						ba_page_shift);
@@ -980,50 +1038,59 @@ int hns_roce_mtr_create(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 			unsigned long user_addr)
 {
 	struct ib_device *ibdev = &hr_dev->ib_dev;
-	unsigned int buf_page_shift = 0;
-	int buf_page_cnt;
 	int ret;
 
-	buf_page_cnt = mtr_init_buf_cfg(hr_dev, buf_attr, &mtr->hem_cfg,
-					&buf_page_shift,
-					udata ? user_addr & ~PAGE_MASK : 0);
-	if (buf_page_cnt < 1 || buf_page_shift < HNS_HW_PAGE_SHIFT) {
-		ibdev_err(ibdev, "failed to init mtr cfg, count %d shift %u.\n",
-			  buf_page_cnt, buf_page_shift);
-		return -EINVAL;
-	}
-
-	ret = mtr_alloc_mtt(hr_dev, mtr, ba_page_shift);
-	if (ret) {
-		ibdev_err(ibdev, "failed to alloc mtr mtt, ret = %d.\n", ret);
-		return ret;
-	}
-
+	trace_hns_buf_attr(buf_attr);
 	/* The caller has its own buffer list and invokes the hns_roce_mtr_map()
 	 * to finish the MTT configuration.
 	 */
 	if (buf_attr->mtt_only) {
 		mtr->umem = NULL;
 		mtr->kmem = NULL;
-		return 0;
+	} else {
+		ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, udata, user_addr);
+		if (ret) {
+			ibdev_err(ibdev,
+				  "failed to alloc mtr bufs, ret = %d.\n", ret);
+			return ret;
+		}
+
+		ret = get_best_page_shift(hr_dev, mtr, buf_attr);
+		if (ret)
+			goto err_init_buf;
+
+		ret = get_best_hop_num(hr_dev, mtr, buf_attr, ba_page_shift);
+		if (ret)
+			goto err_init_buf;
 	}
 
-	ret = mtr_alloc_bufs(hr_dev, mtr, buf_attr, udata, user_addr);
+	ret = mtr_init_buf_cfg(hr_dev, mtr, buf_attr);
+	if (ret)
+		goto err_init_buf;
+
+	ret = mtr_alloc_mtt(hr_dev, mtr, ba_page_shift);
 	if (ret) {
-		ibdev_err(ibdev, "failed to alloc mtr bufs, ret = %d.\n", ret);
-		goto err_alloc_mtt;
+		ibdev_err(ibdev, "failed to alloc mtr mtt, ret = %d.\n", ret);
+		goto err_init_buf;
 	}
 
+	if (buf_attr->mtt_only)
+		return 0;
+
 	/* Write buffer's dma address to MTT */
-	ret = mtr_map_bufs(hr_dev, mtr, buf_page_cnt, buf_page_shift);
-	if (ret)
+	ret = mtr_map_bufs(hr_dev, mtr);
+	if (ret) {
 		ibdev_err(ibdev, "failed to map mtr bufs, ret = %d.\n", ret);
-	else
-		return 0;
+		goto err_alloc_mtt;
+	}
+
+	return 0;
 
-	mtr_free_bufs(hr_dev, mtr);
 err_alloc_mtt:
 	mtr_free_mtt(hr_dev, mtr);
+err_init_buf:
+	mtr_free_bufs(hr_dev, mtr);
+
 	return ret;
 }